Assay.............................................................................................≥99.8%
Ph(50g/L,25°C)..............................................................................5.0~7.0
Chloride and chlorate..................................................................≤0.03%
Substances insoluble in water....................................................≤0.002%
Clarity of solution..........................................................................passes test
Heavy metals (as Pb)...................................................................≤0.0005%
Bromide(Br)..................................................................................≤0.005%
Total nitrogen(N)...........................................................................≤0.001%
Sulfate(SO4)..................................................................................≤0.005%
Fe...................................................................................................≤0.0005%
Na...................................................................................................≤0.01%